John stewaet smith and samuel smith



(No Model.)

JMS. & S. SMITH.

JAGQUARD MACHINE FOB LOOMS.

FIG-.2.

N PETERS. Phmvblncg'apher. wnmn mn, D. Cv

UNiTnn STATES PATENT Trice.

JOHX STEVABT SMITH AND SAMUEL SMITH, OF GLASGOW, COUNTY OF LANAR-K, SCOTLAND.

JACQUARD MACHINE FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 38OA62, dated April 3, 1888.

Application filed November .20, 1886. Serial No. 210,445. (No model.)

T 0 ail whom it 72mg concern:

Be it known that we, J OHN STEWART SMITH and SAMUEL SMITH, of Glasgow, county of Lanark, Scotland, have invented an Improvement in Jacquard Machines for Looms, of which the following is a specification.

Our invention has reference to Jacquard machines for looms; and it consists of certain improvements in the construction thereof, all of which are fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

By our invention we impart a smooth rotary motion to the power-applying devices of Jacquard machines,which will enable the loom to work without shaking and to be driven much faster.

In the ordinaryjacquard the motion by which are raised the brander-knives or the trap-board or book lifting and lowering frame (which acts upon the harness-threads) is invariably communicated by levers working from above by lifting or from under by thrusting upward. This motion causes an overbalancing strain and gives a jerky and shaky motion to the loom.

In our invention a shaft is placed in the middle of the jacquard, preferably near the bot-tom and under where the needles operated upon by the loom-pattern cards would come, and on which shaft we secure six eccentrics, cranks, or camstwo on the inside of the frame of the machine to lift and lower the trap-board which catches the nsuai knotted tails, two outside of the frames to lower and lift the top board from which are suspended the knotted tails, and two outside of these again to work the card barrel or cylinder.

By using the two sets of eccentrics or cams, as described, and causing the trap board to rise with the knotted tails (which have been acted upon by the needles and pattern-cards in the usual way) simultaneously with the lowering of the top board and the remainder of the tails and harness-threads controlled thereby, the open shed can be obtained by. much smaller eccentrics and the warp-yarn only requires to pass through half the distance. At same time the weight on the descending board acts as a counterpoise to the weight on the rising board, (or vice versa,) thereby helping the working of the loom and inducing a more uniform and smooth action; but it is not essential that both boards should move. Either may be a fixture and only one move.

This improvement applies equally to Jacquard machines either with trap-board and knotted tails, as described, or with branderknives and hooked wires, as said boards and branderorhook-liftingknives aresubstantially the same elements, both operating for the same purpose, and thezefore considered as equivalents.

In the drawings, Figure l is aside elevation of a Jacquard machine embodying our invention. Fig. 2 is a sectional elevation of same on line a: x of Fig. 8, and Fig. 3 is a frontview of same.

Aare side frames of the machine, which are connected by braces a.

B is a horizontal shaft extending across the machine, which is adapted to be driven in any manner from the loom or power mechanism for driving the same. This shaft may be located in any convenient position on the frame. Upon this shaft,within the frames A, are secured ec centrics or cams c, and upon the outside of the said frames, and also secured to the shaft,are the eccentrics d and e. These eccentrics are preferably arranged at angles of ninety degrees with reference to each other.

(3 is the trapboard, which is supported upon vertical slides H, having guides h, adapted to slide in the vertical grooves F on the frames A, and said slides are moved vertically by the two eccentrics 0, upon which they directly rest.

D is the top board, which is connected by guides 9 (working in the guide'slots F on the frames A) with the vertical slides G, which receive motion from the cams or eccentrics d, and upon which they directly rest. The top board or lifting-frame, D, is, for simplicitys sake, shown as a simple plain board; but it is evident that so far as our invention is con- 3o tries, and the arms J may be adjusted upon function of the operating-cams and their connections. It will be noted that the eccentrics d and c are arranged diametrically opposite, so that the trap-board and the top board approach and recede from each other. It is evident that either set of these eccentrics may be dispensed with and the corresponding board, D or G, allowed to be stationary. In some cases the trap-board (or where hooks are employed the lower griff) may be made stationary, while the top board, D, or grin may be raised or lowered by the eccentrics in the manner described. On the other hand, the top board, D, or griff may in some looms be made stationary, while the trap-board O or lower griff may be raised and lowered by the eccentries in the manner described. It is obvious that the latter arrangement involves merely a slight reversal of that first referred to, and practically may be regarded as the equivalent thereof.

Eis the card-cylinder, which is supported by reciprocating horizontal rods I, working in bearings i. Said rods are provided with arms J J, between which the eccentrics or cams 6 work to cause a reciprocation of said cardcylinder.

The weight of the trap-board or top board and their slides always insures them working with a steady surface contact with their eccentheir rods by set-screws j, so as to avoid all lost motion with reference to the eccentrics e. By this construction it is seen that a most constant and uniform movement of parts is obtained, all lost motion prevented, less power required, and when applied being uniformly distributed over the entire series of movements. This perfect action of the jacquard enables a greater speed of the operation in the loom, and thereby increases its product in a given time. While we prefer to use eccentrics with the slides resting directly upon them, yet it is evident that an eccentric-strap may encircle the they may be modified without departing from our invention.

Having now described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a Jacquard machine, the combination of the main frame and the vertically-recipro' eating top and trap boards, adapted to approach toward each other or recede from each other,

with a rotating shaft and eccentrics to. simultaneously lower the top board and raise the trap-board, or vice versa, substantially as shown and described.

2. The combination, with the vertically-reciprocating top and trap boards or griffs, the card-cylinder, the guide-rods I, and arms J, of the shaft B and the eccentrics thereon, adapted, as described, to lower the top boards or grids and raise the trap-board or griff, and vice versa, and reciprocate the 'cardcylinder, substantially as described.

3. Thecombinatiomwith the top board, the card-cylinder, the guide-rods I, and arms J, of the eccentrics e d and shaft B, substantially as described.

In testimony of which invention we hereunto set our hands.

JOHN STEWART SMITH. SAMUEL SMITH. \Vitnesscs:

THOMAS SMELLIE, THOMAS P. BROWN. 

